*{
    margin: 0px;  
    text-decoration: none;
  }
.background_div{
    width: 100%; height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    z-index: 0;
    overflow: hidden;
}
.background_img{
    position: absolute;
    width: 100%;
    top: -149.5px;
    left: 0;
    z-index: -1;
    opacity: 0;
    transition: opacity .8s ease;
}
.login_body{
    position: relative;
    background-color: white;
    width: 418px;
    height: 316px;
    left: 52%;
    top: 118px;
}
.login_title{
    font-size: 20px;
    color: #333;
    padding: 15px;
    margin-bottom: 16px;
    text-align: center;
}
.login_form{
    width: 272px;
    margin: 0 auto;
}
.login_uinArea{
    height: 55px;
    position: relative;
    z-index: 10;
}
.login_pwdArea{
    height: 55px;
    position: relative;
    z-index: 10;
}
.login_tips{
    position: absolute;
    top: 13px;
    left: 13px;
    font-size: 14px;
    line-height: 16px;
    color: #aaa;
    cursor: text;
    display: block;
}
.login_inputOuter{
    width: 272px;
    height: 42px;
    background: url("../img/icon_3_tiny.png")-1px -1px no-repeat;
}
.login_input{
    background-repeat: no-repeat;
    background-attachment: scroll;
    background-size: 16px 18px;
    background-position: 98% 50%;
    cursor: auto;
    width: 258px;
    position: relative;
    top: 2px;
    left: 2px;
    height: 18px;
    padding: 10px 0 10px 10px;
    line-height: 18px;
    border: none;
    background: 0 0;
    color: #333;
    font-family: Verdana,Tahoma,Arial;
    font-size: 16px;
}
.login_button{
    position: relative;
    height: 40px;
    background-color: #86ce2f;
    margin-bottom: 10px;
}
.register_button{
    position: relative;
    height: 40px;
    background-color: #3487ff;
    margin-bottom: 10px;
}
.btn{
    width: 100%;
    height: 40px;
    line-height: 35px;
    border: none;
    font-size: 17px;
    font-weight: 400;
    color: #fff;
    background: 0 0;
    cursor: pointer;
}